Over the past couple of months my A55 with the CZ16-80 has been showing intermittent lens to camera connectivity errors where the aperture reading will show F...... and the aperture reading is momentarily 'lost'.

It is gradually worsening and can be replicated by slightly twisting the lens when at it's zoom extremities, in manual or auto focussing modes. The pins and contacts look firm and clean and screws are tight on the metal lens mount. Nothing sounds loose.

It doesn't occur with my Beercan.

Has anyone experienced this? I suppose the obvious cure would be to send my CZ off for a check up?